Out of interest though, if you don't have any information about the
threadpool, how do you know you should use it? I personally don't like
using the system threadpool, preferring either "normal" threads or a
custom threadpool to avoid potential deadlock. (A lot of normal
framework code uses the system threadpool; if you call some of that
framework code *from* a threadpool thread, you can get into deadlock if
the threadpool is full).